diff --git a/drivers/xen/dbgp.c b/drivers/xen/dbgp.c
index f3ccc80a455f54c0abd15c1018f2fc79c7a0332a..8145a59fd9f62b3da7c684a5c4356ac901b535d6 100644
--- a/drivers/xen/dbgp.c
+++ b/drivers/xen/dbgp.c
@@ -19,7 +19,7 @@ static int xen_dbgp_op(struct usb_hcd *hcd, int op)
 	dbgp.op = op;
 
 #ifdef CONFIG_PCI
-	if (ctrlr->bus == &pci_bus_type) {
+	if (dev_is_pci(ctrlr)) {
 		const struct pci_dev *pdev = to_pci_dev(ctrlr);
 
 		dbgp.u.pci.seg = pci_domain_nr(pdev->bus);